Bur-remover.



UNITED STATES PATENT OFFICE.

EDWARD HENRY LESCURE, OF HARRISBURG, PENNSYLVANIA, ASSIGNOR TO THE PENNSYLVANIA STEEL COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPO- RATION OF PENNSYLVANIA.

BUR-REMOVER.

Specification of Letters Patent.

Application filed June 18, 1909.

To all whom it may concern:

Be it known that I, EDWARD HENRY LESOURE, a citizen of the United States of America, residing at Harrisburg, county of Dauphin, State of Pennsylvania, United States of America, have invented certain new and useful Improvements in Bur-Removers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to bur removers for removing the burs formed in punching or otherwise making holes in iron and steel, especially in structural iron and steel, and has for its object to provide a simple and eflicient device for rapidly removing the burs either from a single plate or from a'number of assembled plates, and comprises a driven spindle carrying bur removing elements or cutters adapted to act on opposite surfaces with a planing or scraping action, together with details of construction hereinafter to be more fully described and claimed.

Referring to the drawings, in which like parts are similarly designated: Figure 1 is a longitudinal section partly in elevation. Fig. 2 is a side elevation of the spindle with one of the knife carrying elements in sec-.

tion. Fig. 3 is an elevation of a rod for actuating the pivoted cutters. Fig. 4; is a perspective view of the pin. Fig. 5 is a longitudinal sectional view of a modification with parts shown in elevation. Fig. 6 is an elevation of the parts shown in section in Fig. 5. Fig. 7 is an elevation at right angles to Figs. 5 and 6.

The mechanism is preferably driven by an electric, pneumatic, or other suitable form of motor capable of rotating a shaft 3 having a threaded end and mounted in the easing 2, Fig. 5, the details of structure of which motor form no part of the present invention. The casing 2 is provided with alined handles 4 secured in diametrically oppositely situated bosses 5 on the casing 2 as shown in Fig. 5.

Detachably secured to the rotary shaft 3 by an internal thread or otherwise, is a spindle 6 which carries and drives the bur removing elements. Said spindle is provided with a longitudinal central bore 7 in which is vertically movable a rod 8. Passing transversely through the spindle 6 and intersecting the central bore 7 is a long slot 9. Surrounding the spindle is an operating sleeve 10 the exterior of which is roughened or knurled for hand gripping. This sleeve is connected to the rod 8 by means of a pin 11, more clearly shown in Fig. 4 that passes through the rod 8 so that the ends of the pin project into an internal recess in the sleeve 10 over a shoulder 12, the recess being closed by a nut 13 to retain the pin in the recess, and thus afford a means of vertically moving rod 8 during rotation, by the manipulation of the sleeve. The rod 8 near its lower end is provided with racks 14 symmetrically disposed on its periphery. In the lower end of the spindle is a short slot 15 and in this slot are pivoted by pivots l6 cutters or knife blades 17 having at one end toothed sectors 18 concentric with the pivots, while the other ends of the blades are extended to form cutters which at one time may extend outside the spindle, with the backs thereof resting against the lower end of the slot 15, the upper edges of the knives being sharp and arranged for cutting on the underside of the plates. The toothed. or sector portion of the lower knives engages the racks 14 on opposite sides of the lower end of the rod 8, so that a downward movement of rod 8 will swing the knives on their pivots and withdraw their cutting extensions entirely within the spindle 6. Rod 8 at its upper end is provided with a head 19 fitting into the longer portion of the bore 7 in the spindle 6 and between the head and the base of the longer portion of the bore 7 is a coil spring 21 to hold the rod 8 normally in the position shown in Fig. 1. The rod 8 is provided with a number of perforations 22 for the reception of pin 11 to enable the device to be adjusted for different thicknesses of plates. Below the shoulder 12 the bore of the sleeve 10 is enlarged to provide for mounting therein a cutter sleeve 23 slidably fitted on the spindle 6 and provided with an interior recess 24 in which is seated a coil spring 25 surrounding the spindle 6 and whose upper end engages the actuating sleeve under the shoulder 12. The cuttersleeve' 23 is provided near the middle with an exterior shoulder26 and at its'lower rend is enlarged by a flange 27. Thelower end of the actuating sleeve 10 is-provided with one or more countersunk screws. 28 to hold the cutter sleeve'23 in slidable relation to the actuating sleevelO.

The cutter'sleeve 23 carries'an upper cutter or cutters here shown as two cutters 29 the shanks of which rest in internal grooves in sleeve'23, the enlargement on the upper ends of the cutters 29 entering an internal annular groove 30v in the sleeve 23, the enlarged'lower ends of the cutters extending under the lower end of ,thesleeve23 having preferably beveled cutting faces which are a pressed against the plates being burred.

The backs of these cutters are slidably seated in longitudinal grooves 31 in the spindle 6,

'by which the cutters are carried around, by "rotation of the spindle 6 with the cutter being controlled by the sleeve 10 in conjunccarrying sleeve 23, the application of the cutters to the uppersurface of the plates tion with cutter-carrying sleeve 23.

In the modification of my bur remover 'shown in Figs. 5., 6 and 7 in which 6 is the spindle having an internally threaded end for connecting it to the shaft3 of the motor, there is provided a slot 9 in the spindle conto have it completely cover slot; '9.

siderably shorter than the slot 9 of Fig. 1, and I preferably make the'sleeve 10 considerably longer than in Fig.1 and arrange The endsoftlie pin 11 used for coupling the rod 8 in bore 7 to the sleeve 10 project into an internal annular groove 9 'in the sleeve 10 using screw plugs 10 to keep the.

7 end a pair of pivoted cutters or knives l7 arranged for cutting on the underside of plates, and. arranged for being withdrawn into the spindle by downward movement of rod 8 with racks 1 F that engage the toothed sectors 18 of the blades 17 pivoted at 16 also provide an additionalslot 15 Vin which in slot 15 as shown in Fig. 5. For removing burs on the upper surfaces of plates I 7 are pivoted at 16 cuttersor blades 17 pro- ;vided withtoothed sectors 18 that engage with another set of'rack's 14? formed on rod 8,as' shown in Fig. 5,thebacks of the cut-' ters17 :being uppermost and arranged to restlagainst. the'upper end of the slot 15 when the cutting extensions are thrust out for cutting, at which time the cutting edges down ward movement of the rod 8.

The operation of my device is as follows: The spindle 6 being driven by themotor,

carries with it the pivoted cutters 17, also the cutters 29. The actuating sleeve 10 is free to be held stationary by the hand of the operator, by reason of the pin'11 rotating in the annular groove formed between the shoulder 12 and the nut 13. By gripping the actuating sleeve '10 and pulling it downward to a small extent the cutters 17 are positively moved or rotated on their pivots l6 and placed in position within the spindle for passing into the drilled or punched hole, until the cutters 29 on the cutter-sleeve 23 engage the upper, surface of the plate and remove the bur. Then by raising the actuating sleeve 10 the pressure transmitted through the spring 25 to the cutter sleeve 23 is relieved and the rod 8 is moved upward to throw the cutters 17 into the position shown in Fig.1. The entire tool is then raised until the edges of the cutters 17 come into contact with the lower surface ofthe plate to remove the bur thereon. The entire tooland then the actuating sleeve 10 is moved downward to move the rod 8 again against its spring 21 to turn the pivoted cutter 17 within the slot 15, after which the tool is lifted out of the hole, and the operation is repeated with respect to other holes from which burs are to be removed. It will be noted that both the upper cutter orcutters 29 and the lower cutter or cutters 17 are revolved by the spindle.

. To change the adjustment of the upper that the upper and lower cutter sets are alternately withdrawn, into and projected from the spindle by the movement of sleeve 10*.

I claim:

1 I11 a bur remover, the combination with" a hollow. spindle having longitudinal-grooves therein and capable .of being rotatively spring between the two sleeves surrounding the spindle and pivoted cutters mounted in the spindle and actuated by the rod.

2. In a bur remover, the combination with a hollow spindle capable of being rotatively driven and having upper and lower slots; of a rod having a head thereon and longitudinally movable in the spindle, a spring acting on said head to retract the rod, a cutter sleeve on the spindle having a shoulder 26, an actuating sleeve surrounding the cutter sleeve, a pin passing through the upper slot and the rod and rotatably held in the actuating sleeve, a spring between the two sleeves, a screw in the actuating sleeve in the path of movement of the cutter sleeve, cutters mounted between the cutter sleeve and spindle, and pivoted cutters in the lower slots actuated by the rod.

3. In a bur remover, the combination with a hollow spindle capable of being rotatably driven and having a slot in its lower end; of a rod having longitudinal movement within the spindle, an operating sleeve for said rod, racks on the rod and cutters pivoted in the slot in the spindle and havin toothed sectors thereon engaged by said racks.

4:. In a bur remover the combination with a hollow spindle capable of being rotatively driven and having a slot near its lower end and a slot above the first mentioned slot; of cutters pivoted in the lower slot, a rod longitudinally movable in the spindle and having racks thereon to engage the cutters to positively project them from and withdraw them into the slot and spindle and means operating in the upper slot to move said rod. I

5. In a bur-remover the combination with a spindle and means to rotatively drive the same; of upper and lower cutters both mounted to rotate in unison with the spindle and driven thereby and means to adjust the upper cutters to vary their distance from the lower cutters.

6. In a bur-remover the combination with a spindle and means to rotatively drive the same; of a cutter sleeve slidably mounted on the spindle and cutters in operative relation to the spindle and sleeve.

7. In a bur remover the combination with a spindle having lateral grooves therein; of a cutter sleeve loose thereon having internal grooves registering with those in the spindle and cutters whose shanks take into the registering grooves.

8. In a bur-remover the combination with a spindle having lateral grooves and means to rotatively drive the spindle; of a cutter sleeve having internal grooves registering with those in the spindle, cutters whose shanks take into the registering grooves, an operating sleeve loose on the cutter sleeve and means to connect the sleeves to permit the cutter sleeve and spindle to rotate independently of the operating sleeve.

9. In a bur-remover the combination with a hollow spindle, a rod longitudinally movable in the spindle and pivoted cutters actuated by the rod; of a cutter sleeve slidable but not revoluble with respect to spindle and an operating sleeve connected to the rod and to the cutter sleeve to permit rotation of the rod, spindle and cutter sleeve independently of the operating sleeve.

10. In a bur-remover the combination with a hollow spindle, a rod longitudinally movable in the spindle, and pivoted cutters actuated by the rod; of a cutter sleeve slidable but not rotatable with respect to the spindle, an operating sleeve in rotatable connection with the cutter sleeve and means to connect the operating sleeve and rod to permit the adjustment of said sleeve longitudinally of the rod and thereby adjust the distance between the pivoted cutters and cutter sleeve. In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

EDWVARD HENRY LESCURE. Witnesses:

G120. W. PARSONS, PAUL A. GUENo'r. 

